Get premium membership and access questions with answers, video lessons as well as revision papers.
C = 90-48 = 420
n=1/sinc
n= 1/sin42
n= 1.4945
Kavungya answered the question on November 4, 2019 at 12:48
- Illustrate by means of diagram what is meant by diffraction.(Solved)
Illustrate by means of diagram what is meant by diffraction.
Date posted: November 4, 2019. Answers (1)
- Figure below shows resistors connected in an electric circuit.
Determine the reading of the ammeter.(Solved)
Figure below shows resistors connected in an electric circuit.
Determine the reading of the ammeter.
Date posted: November 4, 2019. Answers (1)
- The figure below shows a wire wound round a soft iron core. A copper cube ,R, is placed just
below end Q.
i) Identify poles P and...(Solved)
The figure below shows a wire wound round a soft iron core. A copper cube ,R, is placed just
below end Q.
i) Identify poles P and Q when switch S is closed.
ii) State and explain what happens to copper cube R when switch S is closed.
Date posted: November 4, 2019. Answers (1)
- Below is a nuclear reaction equation.
Determine the values X and Y(Solved)
Below is a nuclear reaction equation.
Determine the values X and Y
Date posted: November 4, 2019. Answers (1)
- A pinhole camera is designed with many pinholes. State and explain what is observed on the image when the number of pinholes is decreased.(Solved)
A pinhole camera is designed with many pinholes. State and explain what is observed on the image when the number of pinholes is decreased.
Date posted: November 4, 2019. Answers (1)
- The table below shows radiations in their decreasing order of energy.
Identify radiation labeled Q(Solved)
The table below shows radiations in their decreasing order of energy.
Identify radiation labeled Q
Date posted: November 4, 2019. Answers (1)
- The figure below shows two plane mirrors inclined at 450 to one another. A ray of light is incident to the top mirror at 450.
Draw...(Solved)
The figure below shows two plane mirrors inclined at 450 to one another. A ray of light is incident to the top mirror at 450.
Draw the path followed by the ray after reflection.
Date posted: November 4, 2019. Answers (1)
- The table below shows data collected during investigation of Hooke’s law.
a). Complete the table.
b). Using the data in the table, plot a graph of force,...(Solved)
The table below shows data collected during investigation of Hooke’s law.
a). Complete the table.
b). Using the data in the table, plot a graph of force, F against extension, e in the attached gird below.
c). On the graph, indicate X, at the elastic limit
d). From the graph, determine the elastic spring constant for the material.
Date posted: November 4, 2019. Answers (1)
- A 2kg particle tied to rope is rotated about a circle of radius 10 m. given that the maximum tension allowed in the rope is...(Solved)
A 2kg particle tied to rope is rotated about a circle of radius 10 m. given that the maximum tension allowed in the rope is 50 N, determine the maximum speed of the particle if it is rotating in a:-
i). horizontal path.
ii). vertical path.
Date posted: November 4, 2019. Answers (1)
- What is the difference between uniform linear motion and uniform circular motion?(Solved)
What is the difference between uniform linear motion and uniform circular motion?
Date posted: November 4, 2019. Answers (1)
- What property of a gas makes it suitable for inflating tubes? (Solved)
What property of a gas makes it suitable for inflating tubes?
Date posted: November 4, 2019. Answers (1)
- The figure below shows a 4m long uniform metal rod balanced horizontally when two forces act on it as shown.
Determine the value of F given...(Solved)
The figure below shows a 4m long uniform metal rod balanced horizontally when two forces act on it as shown.
Determine the value of F given that the rod weighs 8 N.
Date posted: November 4, 2019. Answers (1)
- Name one scientific skill learnt in a physics practical class. (Solved)
Name one scientific skill learnt in a physics practical class.
Date posted: November 4, 2019. Answers (1)
- The temperature of water in a measuring cylinder is raised from 0oC to 15oC. Sketch the graph of volume against temperature. (Solved)
The temperature of water in a measuring cylinder is raised from 0oC to 15oC. Sketch the graph of volume against temperature.
Date posted: November 4, 2019. Answers (1)
- The figure below shows air blown into a major tube attached to two minor tubes that have been immersed in water. Explain what is observed...(Solved)
The figure below shows air blown into a major tube attached to two minor tubes that have been immersed in water. Explain what is observed then indicate the levels of water in the tubes of beaker X and Y.
Date posted: November 4, 2019. Answers (1)
- Two identical springs in figure below, each of spring constant 6N/cm has negligible weight. They are used to support a load of 4 kg as...(Solved)
Two identical springs in figure below, each of spring constant 6N/cm has negligible weight. They are used to support a load of 4 kg as shown. Determine the total extension of the system.
Date posted: November 4, 2019. Answers (1)
- Figure below shows non-uniform horizontal pipe.
If velocity at point A is 10ms-1 and that of point B of cross-section area 40cm2 is 6ms-1. What is...(Solved)
Figure below shows non-uniform horizontal pipe.
If velocity at point A is 10ms-1 and that of point B of cross-section area 40cm2 is 6ms-1. What is the cross-section area of the narrow part of the pipe?
Date posted: November 4, 2019. Answers (1)
- The micrometer screw gauge shown in figure below had a zero error of – 0.05 mm and was used to measure the diameter of a...(Solved)
The micrometer screw gauge shown in figure below had a zero error of – 0.05 mm and was used to measure the diameter of a steel ball bearing.
Find the radius of the ball bearing whose diameter is recorded by the instrument.
Date posted: November 4, 2019. Answers (1)
- Why do you think we experience more discomfort in hot humid weather than we do in hot dry weather.(Solved)
Why do you think we experience more discomfort in hot humid weather than we do in hot dry weather.
Date posted: October 30, 2019. Answers (1)
- In demagnetization by electrical method:
i) State the type of current used.
ii) Explain your answer in (i) above.(Solved)
In demagnetization by electrical method:
i) State the type of current used.
ii) Explain your answer in (i) above.
Date posted: October 30, 2019. Answers (1)